package lab02.test05;

public class Triangle {
    Triangle(){}
    double sideA;
    double sideB;
    double sideC;
    double perimter;
    double area;
    boolean x;
    //行为：周长，面积。

    void trangle(double sideA,double sideB,double sideC){
        if (sideA+sideB>sideC) x=true;
        else x=false;
    }
     double Perimter() {
         if (x = true)
             return sideA + sideB + sideC;
         else {
             System.out.println("不能构成三角形");
             return 0;
         }
     }
     double alter(double a,double b,double c) {
         sideC = c;
         sideB = b;
         sideA = a;
         return 0;
     }

}
